[MC-108128] Chaining too many observer blocks crashes the game

title says it all.

Steps to reproduce:

Make an observer line over several thousand blocks and update the first one. The game crashes for me everytime

Environment

OS: Windows 7 (ver 6.1, arch amd64)
Java: 1.8.0_25 (by Oracle Corporation)
Launcher: Minecraft Launcher 1.6.61 (bootstrap 100)
Minecraft: 16w39c (updated Fri Sep 30 16:13:34 CEST 2016)

Attachments

crash-2016-10-02_16.14.48-server.txt

Comments 4

migrated 2016-10-02T09:16:26Z

Due to the activation sequence of observers, I would suspect that a stack overflow is the culprit. One experiment would be test the crash using various stack sizes for the JVM.

Marcono1234 2016-10-02T13:58:45Z

Yes, probably invalid because of this.

Easy way to reproduce:
Create a superflat world with the following preset and break a block.

3;minecraft:observer;127

migrated 2016-10-02T14:00:46Z

Just for completeness sake, can someone upload a crash report for this issue.

migrated 2016-10-02T14:15:58Z

Here you go.